Weighing scale



Sept. 22,' 1925.

Filed May 21, 1925 2 Sheets-Sheet 1 fige sept. 22, 1925. 1,554,262

F. DOPP WEIGHING SCALE Filed May 21, 1925 2 Sheets-Sheet 2 Patented Sept. 22. 1925.

UNITED STATES FRITZ nerr, or BERLIN, GERMANY.

WEIGHING- SCALE.

Application filed May 21, 1925. Serial No. 31,'830.

T o aZZ lwhom it may conce/m.'

Be it known that I, Fnrrz Dorr, a citizen of the German Empire, residing at Berlin NV. 40, Germany, have invented certain new and useful Improvements in Weighing Scales; and I do hereby 'declare the following to be a full, clear, and exact description ot the invention.

rlhis invention relates to weighing-scales with indicator dial and pendulum weights or poises, the essential cliaracteristic teatures oi which weighing-scale are to be seen in the arrangement of the four balancing edges provided on both the carrying levers of the triangular type for the weighing platform, in a horizontal plane and in that the sha-nks of said levers are parallely arranged one beside the other in the same direction.

In the arrangement the load exerts a pressure upon the centre ot a system, consisting of two steel bands provided between two pendulum levers. The angles between the arms of the counterweights and the system of steel bands are chosen in such a way, that the centre ot the system of steel bands will be depressed proportionally to the increasing load. The said steel bands are segments, which are tixedly connected to one another. From the said system leads a steel band which is passed round a curved disc, the shaft of which latte-r is provided with a hand or pointer which moves in front of a graduated disc or dial.

In` the drawing one mode ot execution according to the invention is shown in which- Figure l is an elevation with the casing opened;

Figure 2 is a side view of Figure l partly in section, and

Figures 3 to 7 show details.

Zithin a base a of the casing or frame of the weighing-apparatus pans c (Z are arranged for the edges c CZ of both the carrying levers e and f of the triangular type, that is to say levers upon which the balancing edges are arranged in the same passed with their ends over semi-circular plane and in a triangle, the said carrying levers being located beneath the loading platform. These carrying levers e, 7", a perspective view of which is shown in Figure 3, differ from the customary carrying levers in that the four balancing edges ZL are all arranged in a horizontal plane. In addition the shanks e, f of the levers e, carrying at their ends balancing edges i are disposed parallely in the same direction. This result is obtained by bending the shank of the lever e at e2 slightly in au upward direction.

On account of this arrangement the two carrying levers c, f will describe circular curves in equal direction, thus ensuring a great 'sensibility of play during the weighing operation.

In a bracket 7c secured to the fra-me or casing an horizontal weighing lever Z is arranged, resting with the its edge Z in a pan m and carrying counterw-eights Z2, Z and in addition a segment Z4. The said lweighing lever Z is connected to the carrying levers e, f by means of two connecting rods n, o, engaging the edges z' of the carry- 75 ing levers e, f. The said rods will transfer the weight of the loaded platform g to the weighing lever Z. The distance of the balancing edges of the levers is such that the same ratio of transmission will be obtained for the carrying levers.

To the segment ZL of the weighing lever Z a steel band is connected, which latter will transmit the weight of the load to the pendulum weights. The edges r of the levers s of the pendulum weights rest in pans y) provided in brackets y. Steel bands u engage the upper edges s of said pendulum levers s by means of pan links t and 9 are passed round segments o having semicircular faces o', and which are clamped by means of clamping plates o2 to said segments. The two segments o are secured to one another by means of a suitable clamping device w as illustrated in Figure 4 in a vertical section,` Figure 4 a top vie-w and Figure 5a side view. The steel band a', is secured to the segments /v by means of said clamping device w, the lower end of which steel-band is connected as stated above to the segment Z4 of the Weighing-lever Z.

At the, lower ends of the pendulum levers s levers s2 for the eounteriveights are arranged. The position of the levers .s for the pendulum weights is chosen in suoli a manner, that the levers s2 of the counterweights are disposed at an angle of about 45o, swinging lout slightly beyond that position, and that furthermore the detleel'ion of the two steel bands u as uniitorm as possible.

A. steel band ai leads from the segments o to a curved dise i/ wedged upon an arbor or shaft .e liournaled in the easing o. The steel band fr as is illustrated in. Figures 1 and 2 is secured at its lower end to the clamping means in by a yole w and at its upper end to the periphery or the eurved dise 3/ by means ot a bolt y (Figs. (3 and 7) in sueh a manner that it 'will cause the Curved dise li/ to ellect a Yfull revolution.

Upon the arbor 2 a second disc l is arranged which is engaged by one end oit a steel band 2, the opposite end ot which iat.- ter engages a lever 3 or the counterweights pivoted in the casing Z) at l.

A linger 5 is att-ached to the shalit e and moves in front of a. graduated dise or seale` or dial 6, on which the weight can be read. The uniformity ot the seale 6 is obtained through a corresponding position and atjustnient of the segment Ziel1 the lever Z and through a corresponding construction oit.' the curved dise y.

During the operation 01"' the weighing apparatus the lever Z will siinlr down together with the segment Zl and the steel band ai connected to the latter, pulls the steel bands u downward by means o'l the segments o which will Cause the levers s of the pendulum weights to swing aecordingly. The segments sinking down cause the shalt .e to rotate tlnfough the steel band ai and in consequence the linger 5 will rotate in front of the dial G.

It ,is obvious that the steel bands w, and 2 may be replaced by chains or similar devices.

I claim:

l. In weighing Scales having an indicator rlial and pendulum weights, the combination of a casing, substantially horizontally arranged Carrying levers ol1 the triangular ype mounted within the base ot the easing and having parallel shanlrs and load supporting edges disposed on said levers in a. .substantially horizontal plane.

2.151 weighing-scale, comprising a easing, pendulum levers mounted in the easing and having arms carrying count u' weights, carryii'ig-levers olf the triangular type having parallel ends arranged in the same plane and having load supporting edges lum le mounted in the casino disposed thereon in a horizontal plane, a platform carried on said edges, and a system of steel bands eoimeeting t-he pendulum levers w iereby a load exerts pressure on the center ot the system, the angle between the counter weight arms and the system of steel bands being such that the center of the system will be displaced in proportion equal to the increasing load.

8. A platform weighing-scale con'iprising a easing, pei'idulum levers mounted in the easing, carrying levers o'l the triangular type arranged beneath the platform and having parallel shanlis in the same plane, said carrying levers having weigliing edges disV )sed in a horizontal plane, load supper ng on the levers lor supporting the platform, connected segments arranged between the pendulum levers, flexible members eonn sting the latter to the segments, and a 'lie/Xi le men'iber connected with the segnie'ts and with the carrying levers.

el. ,fr platform weighing-fiscale eomprising a easing, jliemlulum levers mounted Vin the easing, carijving levers olf the triangular type arranged beneath the platform and having parallel slianlis in the same plane, said cr ying levers having weighing edges in a, horiyontal plane, load sups lon the levers for supporting the platl'orm, Connected segments arranged between the pendulum levers, flexible members connected to the latter and extending around the segments, and a VIlexible member connected to the segments and with said carrying levers.

A plattform weighing scale comprising a casing, an indicator dial therein, pendun, Carrying levers oi the triangular type arranged beneath the platform and having parallel. shanlis in the same plane, said Carrying levers lnwiiig weighing edges disposed in a horizontal plane, connected segments arranged between the pendulum levers, ilexiblo members connecting the latter to the segments, a flexible member connected to 'the segments and with the carrying levers, a pointer movable over the dial, a flexible actuating member connected to the segments, and means connecting the pointer with the flexible actuating member.

(i. A platform weighing scale comln'isiug a casing, an indicator dial therein` a pointer movable over the dial, pendulum levers mounted in the casing, substantially horizontal carrying levers olI the triangular type arranged beneath the platform and havingl parallel Shanks, said carrying levers having' weighing edges disposed in a horizontal plane, oppositely arranged connected segments locrlted between the pendulum levers, liexiblr-, members connerting the latler to the segmenten a l'lexible member connected to the segments and with the carrying levers` a rotaryl member carrying the pointer, and a ilexible member connected to the segments and with the rotary member.

7. In a Weighing scale, a pair ol' Substantially horizontally disposed levers eac-h having two arms provided with pivot edges and an auxiliary arm having a balancing edge7 said auxiliary arms being adjacentand parallel, all of said edges lying iii a 10 plane, and a pair of load supportingedges on each of the tivo arms of the levers, all lying in the same plane. i

In testimony whereof I have signed my name to this specication.

FRITZ DOPP. 

